/Engine/Plugins/Animation/DeformerGraph/Source/OptimusCore/Public/OptimusNode.h
Returns the node's diagnostic level (e.g. error state). For a node, only None, Warning, and Error are relevant.
[EOptimusDiagnosticLevel](API\Plugins\OptimusCore\EOptimusDiagnosticLevel) GetDiagnosticLevel() const